Method and apparatus for producing plywood



Oct. 8, 193 A. B. BIRTLES METHOD AND APPARATUS FOR PRODUCING PLYWOODFiled July 11. 1931 JNVENTOR. AQTHUD. B. B\DTL.ES

ATTORNEY.

Patented Oct; 18, 19 32 amara B. muss,

mn'rrron 1 aNnfAPrAnA'rUS Application m Ju1 j11,

-The purpose ofthis invention is to, pro

' vide a method andapparatus for facilitating J the economical. gluingand assembling of the various members entering intofthe construe:

whereby the members 'ofa plywood struc cture are pre-shaped anddelivered to the ma chines for passagetherethrough employing an 7organized method of applying'the glueto the constituent members and]completing the product. i i

tiously and with precision with'the minimum consumption of glue-on thematerials and" a 1 reduced amountof floor space for'tlie inae chine. v

A still further object is to reduce the nums ber of manual operationsand the' labor costs entering into the product;

With these and other objects inyiew my inventionv consists in theconstruction, combination andzarrangements of the various parts of myplywood apparatus and the method of operating same whereby the vob-- jects contemplated. are attained as hereinafter more 'fully set'fo'rthiandpo'inted out in .my 1 claims and illustrated inthejaccompanying drawing, in whicha Figure 1 is aperspectiveiviewillustrative of the mechanical:apparatusemployed in oneI interpretation 1' of the" invention.

'QFig. 2 is across-sectional view of the toppart of the rear table, ason line "22- or" tion consisting "of the plurality of members,

An 'bject istoperform the" worh expedis,

. present afminimum'ofsurface or bearingto a V L usually designated as acaul board; I

u I'TEn ASIA-T ES OF-Flea LOUISVILLE, KENTUCKY non rnonucmd rnywoon1931. Serial n 550,059..

Fig. 1 plus a fortion of the product and it further shows a a means ofsecuring, same to thetabletop. r Fig/3 is a perspective of a simple formof productlw'ith aeportion of it broken away, thewholebeing'assembledonto carrieror caul' board "-r ri 10, 10 are pedestalscarrying rollers"11,"11 which are to automatically supplied-with glue,thef'apparatus for thisnot. beingshown aslit isan ordinary expedient andno part of this'in'vention. .121is stable-placed sub I stantially levelwith the openings" between t the." rollers for. the readysupply ofthecentral. or core members of the product which may beiof any conventionalform andspread v out linearly on the top of the-table for a given]quantity or :this' material may be stacked; 13 isa' table constitutingthe remote section of the apparatus which-is especially constructed withafmovable or swingabletop 14 carrying invertedV shape rails 15 linearlydisposed and at a selected level to receive the core members as they arefed-through the rolls. Theinverted V rails are employed to the wet gluecoated surfaces of the core members so as'not toremove the glue. Theserails, in the simple form selected for illustration, are secured bycross'members 16to a master rail 17 carrying hinges 18 which, inturn,are supported on the tab1ei13 so that the entire top may'describe acircular path about the hinges which function will be further'ex plainedhereinafter. Onv the table 13 are; arms 19 which may be movableorstationary-and are arranged'to carry a receiving. board such as 20,shown in Fig; 3 and is i 85 v M ethod of operatzon jTherolls are putinto operation so as to be carrying the liquid glue, short cross cores21v 1 of the product shown in Fig. are assembled on table 12, and thenmanually, serially fed through the rolls wherethey are enveloped withglue and on to inverted V rails 15, each succeeding core member forcingthe preceding one through the rolls thereby substantially eliminatingthe spaces normally occurring between same. lVhen the desired length ofcross members have been coated and transferred to table 14 they arestopped and a surface or veneer member 22 or a plurality of same isplaced on top.

Theproduct thus far processed is secured directly to rack 14 by means ofa series of clamps 23 in order that it may be reversed withoutdisturbance. At this stage the entire top with product is swung abouthinges 18 until same is reversedand resting on caul board 20 which hadbeen placed on to arms...

19. At this stage the clamps 23 are removed,

then rack is returned to position shown in Fig. 1 which leaves theproduct resting on the caul board with veneer facing 22 down and theformerly lower'glue coated side of the cores 21 faced up to receive theother surface orveneer member 24., a

7 At this stage the caul board is removed to be placed in a press'forfinal setting and another caul board placed on to arms 19'which.

completes the cycle. The apparatus is now ready for a repetition of theprocess.

Cores, 21 are preferably so placed ontable 12xthat-in passing throughthe rolls onto racklttheir near ends will fall in line' with the'masterrail 17 which projects abovevrails 15- for the purpose of determiningthe alignment of parts 21 and'22. This alignmentis preserved duringclamping or securing re-' ferred .to above until said clamps areremoved.; ..To care for. any incident misalign-e ment: of these partsthis masterrail has been sufliciently elevated so that in the returnmovementon axis 18? of hinge 18, it will en:

gage the cores and veneer which are at this stage still surfaced 'withunset or fluid glue and thereby align same after they have beendeposited on to the card board. It will read ily be seen that thisfeature was developed for the purpose ofmechanical alignment andelimination of an otherwise probable manual operation.

' Scope "The apparatus 1' have shown is purposely selected for itssimplicity, in being of an early t pe in the'development of thisinvention. Iany modifications maybe indulged without departing from thespirit of the in-v vention, such as by adding automatic feedingapparatus and means to rotate the re ceiving rackabout the axis shown orother axes. Therefore,I wish to be limited onlyby the appended I claim:

claims.

1. The'method of asselnbling layers of 7 wood or the like for producinga built up.

structure of plywood which comprises si 7 product thus far processed tosaid rack, then reversing the whole and releasing said prod not andapplying another surface member entering into the product to the lastexposed surface.

' 2. The: method of assembling layers of wood or the like for produeingabuilt up structure of plywood which comprises simultaneously coating theopposite faces of a central member with an adhesive and delivering sameonto a pivotally reversible rack, then applying a surface product memberto the exposed surface and securing the product thus far processed tosaid rack, then reversing the whole'to expose the under surface of the'cen tral member,'releasing said product and'applying another surfacemember entering into the product to the last exposed surface.

The method of preparing-layers of wood'or thedike for producing abuiltup structure of plywood which comprises simultaneously coating the;opposite faces of a succession of core stock pieces'to constitute thecentral members with an adhesive and delivering same ontoapivotally'reversible rack equipped with an aligning rail, then applyingasurface product member to the exposed surface "and securing the productthus farprocessed t0 saidrack, then reversing the whole to expose theunder surface of the central members, releasing and aligning saidproduct by said rail and then applying another surface member'enteringinto the product to the last exposed surface.

4;. A gluing machine comprisingmeans providing a pathway for the work,applying glue to both faces thereof and feeding the work forward, amember receiving the work so fed which is pivotally-mounted to turn overand having means to secure the Work thereto so as'to be turned overthereby.

5.'A'gluing machine comprising means glue to both faces thereof andfeeding the work forward, a member provided with a series. of railsforming a horizontally disposed rack to receive the work so fed which ispivotally mounted to turn over and having; means to securethe workthereto so as to be turned over thereby.

. 6. In an apparatus formaking-plywood comprising two tables, apair ofglue applying rolls disposed between said tables for feeding'core stockand coating both sides of said stock' as it passes from the'front tableto the back table which is equipped with a member forreceiving the workso fed which 1 is pivotally mounted to turn over and having means tosecure the work thereto so as to be turned over thereby. p

7. In an apparatus for making plywood comprising equipment forstoringstock, adjacent to which is disposed a :paircof glue applyingrolls for feeding core (stock and coating both sides of said stock as itpasses through said rolls to a member whlch is equipped for receivingthe work so fed which is pivotally mounted to turn over and having meansto secure the work thereto so as to be turned over thereby.

Intestimony whereof I aflix my signature;

ARTHUR B. BIRTLES.

